Reservoir for easily polymerised compound

FIELD: chemistry.

SUBSTANCE: invention can be used for distillation or evaporation column. Column bottom liquid, heated in reboiler 5, is fed through supply hole 1a, located in side wall of column body 1. Body 1 of column contains upper plate 12a higher than supply hole 1a, and impingement plate 12b, which is located vertically to upper plate 12a. Upper plate 12a is located in such way that upper surface of upper plate 12a is inclined down from its basic end to tip.

EFFECT: invention allows inhibit formation of polymerised product and ensure stable continuous operation of column equipment during long time period.

5 cl, 4 ex, 6 dwg

 

The technical field to which the invention relates.

The present invention relates to a column equipment, such as distillation column and evaporative column for easily curable compounds or column for the reaction of decomposition of high boiling substances, and peripheral equipment. More specifically, the present invention relates to a column equipment having a reboiler and peripheral equipment.

The level of technology

Production equipment can be easily polymerized compounds, such as (meth)acrylic acid or (meth)acrylate, uses column equipment, such as distillation column for crude (meth)acrylic acid or crude (meth)acrylate, or the column of the decomposition reaction for return (meth)acrylic acid or similar compound produced by the decomposition of the high-boiling substances. In this column the equipment part of the column bottom liquid is fed to the reboiler and heated it may return in the column. To return the liquid containing an easily curable compound in the column from reboiler, the column can be equipped with: a nozzle for supplying heated liquid to the column of the open part in the side wall of the column; a baffle to prevent dispersion of the liquid in the feed direction; and a top plate to prevent the seivane fluid up.

In the column the equipment having such a structure, the liquid containing an easily curable compound is collected on the upper face of the top plate due to: the filing of the side wall of the column; adhesion or falling in drops from the top to the top of platinum; and the like. Gathering the liquid is heated by liquid or gas that is heated in the reboiler, and can form a cured product.

To counteract the formation of a polymerized product can be used a process comprising providing at least one hole in the top plate to prevent the accumulation of liquid, allowing the liquid on the top plate to fall. However, liquid or gas, is heated in the reboiler, pass through the hole, and called this resistance prevents a sufficient drop of liquid on the top plate. Providing a large number of holes for a sufficient drop of liquid allows the liquid or gas is heated in the reboiler, to pass through such openings. Thus, the goal of the position of the upper plate (to stop the upwards flow of liquid or gas, is heated in the reboiler, with the top plate) cannot be achieved sufficiently.

Description of the invention

The present invention is the suppression of the formation of the cured product of sredstv the e fluid or gas, heated in the reboiler, in a column with a simple structure; and stable continuous operation of the column equipment for a long period of time by solving the above problems.

When conducting research, it was found that the objective can be achieved through the location in the column processing equipment can be easily polymerized connect the top plate to prevent scattering up liquid containing an easily curable compound supplied from reboiler, so that the tip of the upper plate is tilted down.

That is, the present invention is a container for easily curable compounds, comprising: a receiving portion that has a side wall and a hole for the fluid in the side wall; an upper plate, which is positioned in such a way that runs from the side wall over the hole to prevent dissipation up fluid from the hole; and a bump that has been removed from the hole, to prevent the dispersion liquid from the hole in the feed direction, the upper surface of the upper plate is inclined downward from its base end to the tip, with the end of the side wall of the upper plate is formed as a base end, and a protruding end the top plate is formed as a tip.

According to the present invention, the inclination of the top plate prevents the formation of a polymerized product, as the fluid collecting on the top plate is removed.

Preferably, the receiving portion is one selected from the group consisting of a distillation column, evaporator columns and columns for the reaction of decomposition of high-boiling substances.

Brief description of drawings

Figure 1 shows a vertical section of the lower part of the housing 1 of the column, such as a distillation column or column decomposition reaction according to variant implementation of the present invention.

Figure 2 shows a horizontal section of the lower part of the body 1 of the column shown in figure 1.

Figure 3 shows a vertical section of the lower shell 1 columns according to another variant implementation of the present invention.

Figure 4 shows a vertical section of the lower shell 1 columns according to another variant implementation of the present invention.

Figure 5 shows a schematic diagram of the distillation apparatus according to a variant implementation of the present invention.

Figure 6 depicts a schematic diagram of the apparatus of the decomposition reaction for high-boiling substances according to a variant implementation of the present invention.

The best way of carrying out the invention

The capacity to easily curable compounds of the present invention includes: a host h is here, which has a side wall and a hole for the fluid in the side wall (hereinafter "hole to feed"), open in the side wall for the fluid, for reception of the fluid supplied from the feed opening; the upper plate, which is positioned in such a way that runs from the side wall above the feed opening to prevent dissipation up fluid from the feed opening; and bumpers, remote from the feed opening to prevent dispersion of fluid from the feed opening in the feed direction. The capacity to easily curable compounds of the present invention can be applied to the vessel, receiving at least a liquid.

Easily curable compound, which constitutes the subject-matter of the present invention is not limited specifically to the connection, easily polymerized by heat or the like. Among the easily curable compounds, at least one selected from the group consisting of acrylic acid, methacrylic acid and their esters, preferably. Examples of acrylates include methyl acrylate, acrylate, butyl acrylate, isobutylamine, tert.-the butyl acrylate, 2-ethyl hexyl acrylate, 2-hydroxyethylacrylate, 2-hydroxypropylmethacrylate and methoxyethylamine. Examples of the methacrylates include compounds similar to the above acrylates.

The receiving part of the e is limited specifically to the inclusion of the side wall and the feed opening for the fluid and the adoption of the fluid, supplied from the feed opening. Examples of the host include part distillation column, evaporator column, the column of the decomposition reaction of the high-boiling substances or the like, and a reservoir for receiving the liquid, easily curable compounds. In the present invention, the receiving portion preferably represents a receiving portion selected from the group consisting of distillation columns, evaporative pillar decomposition reaction of the high-boiling substances or similar.

The liquid containing an easily curable compound is not limited specifically to the content of easily curable compounds. Examples of the liquid include a liquid containing a liquid, easily curable compound; the solution is easily curable compounds containing an appropriate solvent and easily curable compound. The liquid may contain an additive such as a polymerization inhibitor to be added, if required.

The top plate is positioned in such a way that runs from the side wall above the feed opening in the receiving part. As the top plate is used the top plate, which prevents the diffusion upward from the fluid feed opening and has an upper surface that slopes downward from the base end to the upper end of the upper plate when the upper end plate at the side wall is defined as a base end, and passing from the side wall of the upper end of the plate is defined as the upper end. This top plate can represent: a plate-shaped with parallel upper and lower surfaces; or the element having a wedge shape with the top surface or the top surface and the bottom surface, in which the distance between the upper surface and the lower surface of the cross section gradually decreases from one end to the other.

In addition, the top plate may have a top surface that slopes downward from the Central part to the at least one lateral end of the upper plate. Examples of such top plate include a semi-cylindrical top plate so that the cross-sectional shape of the upper plate in the direction of propagation is an arc that is convex upward; and a flat plate inclined downward from one lateral end to the other lateral end of the upper plate. This side plate can be tilted downward from the base end to the tip, or not to be inclined downwards from the base end to the tip.

The shape and number of the top plate used in the present invention is not limited specifically, provided that the above-mentioned conditions are satisfied. In addition, the top plate may be provided with holes, kaniuk the mi or similar for the immediate removal of easily curable compound on the upper surface of the upper plate without limiting the number or shape.

The angle from 91 to 135° between the upper surface of the upper plate and the side wall is preferred from the viewpoint of preventing diffusion upward from the fluid feed opening and prevent accumulation of liquid on the upper surface of the upper plate and so on. The angle of inclination of the upper plate, lower than 91°, may be insufficient to prevent the accumulation of liquid on the upper surface of the upper plate, possibly leading to the formation of the polymerized product is easily curable compounds. The angle of inclination of the top plate is greater than 135°, may not prevent the dissipation of up liquid or may be contrary to influence the flow of the liquid in the receiving part.

The shape and number of the bump is not limited, because the bump is removed from the feed opening in the receiving part and preventing the dispersion of fluid from the feed opening in the feed direction. Bumpers may be positioned vertically from the top plate or may be supported by a supporting element extending from the side wall.

The capacity to easily curable compounds of the present invention preferably contains: the passage of the circulating fluid to drain fluid received in the receiving part, and returning the liquid to the receiving portion of the feed opening; and a reboiler for heating the liquid in the passage of the circulating fluid to apply the present invention in the distillation column, evaporative column and the column of the decomposition reaction for high-boiling substances.

High-boiling substance in the present invention relates to compositions containing an easily curable compound and a composition having a boiling point higher than the boiling point of easily curable compounds. Examples of such high-boiling substances include Michael adduct described below, the column bottom liquid and residue.

The passage of the circulating fluid can be: a passage for fluid, open in the lower part of the receiving part and connects the lower open part with the feed opening; or passage connecting the drain line for draining fluid from the receiving part with the feed opening to return part of the fluid line leading to the receiver part of the feed opening.

The reboiler is not limited specifically to a device for heating the liquid introduced into the passage of the circulating fluid to the desired temperature. The reboiler can use the known device, such as a heat exchanger such as heat exchanger with vertical fixed tube plate type heat exchanger in which the fluid passes through the tubes and the heating medium passes through the shell; and a heater for heating the liquid in the passage of the circulating fluid. Specific examples of the heat exchanger includes a vertically fixed the Anna pipe plate, with horizontal fixed tube plate, U-tube, double pipe, spiral, square block, laminar and film evaporator. The reboiler is usually there to every column. The reboiler is usually classified as a reboiler located inside the column (the receiving side), and a reboiler located outside the column, but in this invention it is usually located outside the column.

Another element or device may optionally be used in the present invention. Examples of such other elements or devices include a bottom plate below the feed opening to prevent the dissipation down fluid from the feed opening or to reduce the rate of flow down the fluid from the feed opening; a side plate located on the side of the feed opening to prevent horizontal dispersion of fluid from the feed opening; feeder fluid, such as a pump, located in the passage of the circulating fluid; and a device that controls flow rate, such as measuring currents or flow meter. This other element or device may be arbitrarily located under such conditions, as the shape of the receiving part, the structure of the capacity for easily curable compounds of the present invention, the view easily curable compounds the composition of the liquid.

If the receiving part is a distillation column, can be used, for example, distillation column, commonly used in chemical plants. Plates or gaskets are located inside the distillation column. Specific examples of dishes include nozzle plates, each with a drain Cup / tube sheet plates, valve plates, plates SUPERFRAC, plates MAX-FRAC and plates dual stream without drain cups.

Examples of structured packings include: SULZER PACKING, available from Sulzer Bothers Ltd.; SUMITOMO SULZER PACKING, available from Sumitomo Heavy Industries, Ltd.; MELLAPAK, available from Sumitomo Heavy Industries, Ltd.; GEM-PAK, available from Koch-Glitsh, LP; MONTZ-PAK, available from Julius Montz GmbH; GOOD ROLL PACKING, available from Tokyo Tokushu Kanaami K.K.; HONEYCOMB PACK, available from NGK Insulators, Ltd.; IMPULSE PACKING, available from Nagaoka International Corporation; and MC PACK, available from Mitsubishi Chemical Engineering Corporation. Examples of random fill include: INTALOX SADDLES, available from Saint-Gobain NorPro; TELLERETT available from Nittetsu Chemical Engineering Ltd.; PALL RINGS, available from BASF Aktiengesellschaft; CASCADE MINI-RING available from Mass Transfer Ltd.; and FLEXI RINGS, available from JGC Corporation.

The type of plates and gaskets are not limited in the present invention, and it is possible to use one type of each of the plates or gaskets, or two or more of them may be used in combination, as is commonly used.

If the receiving part is a evaporative colón Prov., you can use evaporative column, usually applied at a chemical plant. That is, the evaporation column provided with the evaporator and the reboiler, and may contain a cooling heat exchanger for condensation of the gas which has been evaporated, the storage tank for condensate and pump condensate and so on. The structure of the evaporation column is not specifically limited in the present invention. Column decomposition reaction has the same structure as the structure of the evaporation column. Possible case when plates or gaskets are present in the column, and the case when the plates or gaskets are missing in the column. In the present invention can be applied to any case.

Materials for various pipes, casing columns, reboilers, piping, top plates, bumpers and the like of each column used in the present invention are selected depending on, easily curable compounds and temperature conditions in it. Stainless steels are often used as such materials during processing, such as receiving, cleaning or the like (hereinafter may also be referred to as the "acquisition"), (meth)acrylic acid and (meth)acrylates, which are typical easily curable compounds, for example, but the materials are not limited to stainless steels. Note the market of such materials include SUS 304, SUS 304L, SUS 316, SUS 316L, SUS 317, SUS 317L, SUS 327 and hastelloys. The materials chosen accordingly, the physical properties of each fluid from the standpoint of corrosion resistance.

The capacity to easily curable compounds of the present invention can be used on the side of the stage or all stages of obtaining easily curable compounds. The stages of obtaining a purified product of acrylic acid, which is easily curable compound include, for example, the following steps from (1) to (3).

(1) the Method includes: a step of oxidation to obtain the acrylic acid gas-phase catalytic oxidation of propane, propylene and/or acrolein; gathering phase for collecting the acrylic acid in the aqueous solution of acrylic acid by the gas containing acrylic acid obtained during the oxidation, in contact with water; phase extraction for the extraction of acrylic acid using the appropriate extracting solvent from the aqueous solution of acrylic acid obtained in the collection phase; phase separation for separation of acrylic acid and solvent from the resulting extract; stage cleaning of the separated acrylic acid by distillation or the like; a stage of return to return valuable substances fed into the column of the decomposition reaction as a raw material of the high-boiling liquid (liquid high-boiling washes is in), containing the Michael adducts of acrylic acid, returned from the above steps and polymerization inhibitor used at each stage; and the step of recycling to the feed returned valuable substances at any stage after stage of the collection.

(2) the Method includes: a step of oxidation to obtain the acrylic acid gas-phase catalytic oxidation of propane, propylene and/or acrolein; gathering phase for collecting the acrylic acid in the aqueous solution of acrylic acid by the gas containing acrylic acid obtained during the oxidation, in contact with water; phase azeotropic separation to extract the crude acrylic acid from the bottom of the column azeotropic separation by distillation of an aqueous solution of acrylic acid obtained in the collection phase in the column azeotropic separation in the presence of an azeotropic solvent; a step of separating acetic acid to remove acetic acid from the extracted acrylic acid; stage purification to remove high boiling impurities; the stage of return to return valuable substances fed into the column of the decomposition reaction as a raw material of the high-boiling liquid containing the Michael adducts of acrylic acid, returned from the above steps, and the polymerization inhibitor used at each stage; and the step of recycling to the feed returned valuable substances at any point p is the next stage of the collection.

(3) the Method includes: a step of oxidation to obtain the acrylic acid gas-phase catalytic oxidation of propane, propylene and/or acrolein; stage collection/separation to collect acrylic acid in the form of an organic solution of acrylic acid by the gas containing acrylic acid obtained in stage oxidation in contact with the organic solvent and simultaneous removal of water, acetic acid and the like; a splitting step for extracting acrylic acid from the organic solution of acrylic acid; the stage of return to return valuable substances fed into the column of the decomposition reaction as a raw material of the high-boiling liquid containing a polymerization inhibitor and an organic solvent, used at each stage, and the Michael adducts of acrylic acid, returned from the above steps; the step of recycling to the feed returned valuable substances at any stage after the collection phase; and a step of cleaning solvent to clean parts or just returned an organic solvent.

The method of producing acrylate includes, for example, the stage of the esterification reaction involving the reaction of acrylic acid and an alcohol with an organic acid, a cation exchange resin or the like as a catalyst; the stage of concentration, including extraction, evaporation and distillation as a separate operation for the end is tiravanija liquid crude acrylate, obtained by the esterification reaction; stage cleaning in the column purification of the acrylate in the concentrated liquid obtained at the stage of concentration; the stage of return to return valuable substances fed into the column of the decomposition reaction or return to process high-boiling liquids containing acrylates in the column bottom liquid of the column cleanup and Michael adducts, such as β-aryloxyphenoxy, β-alkoxyamine and β-hydroxypropionate as main components, and the polymerization inhibitors used in the above stages. Individual operations phase concentration arbitrarily chosen depending on the ratio of the raw material of acrylic acid and alcohol in the esterification reaction, the catalyst used in the esterification reaction, physical properties of raw materials, side reaction products and acrylates, or the like.

High-boiling liquid may include: acrylic acid, a dimer of acrylic acid (hereinafter known as dimer, trimer of acrylic acid (hereinafter called the trimer), β-alkoxyamino acid and β-alkoxyamine obtained from the sections, except the bottom part of the column purification of acrylic products at any stage, as main components; and polymerization inhibitors used in stages depending on the alcohol. Valuable substances can be the return of such high-boiling liquid supply high-boiling liquid as a high-boiling liquid, containing adducts of Michael, in the column of the decomposition reaction. Then returned valuable substances can be submitted at the appropriate stages, such as stage of the esterification reaction and the stage of concentration.

The aforementioned Michael adducts of acrylic acid or acrylate relates to the product obtained by the condensation of Michael acrylic acid and raw materials acrylate. Examples of such adducts Michael received upon receipt of acrylic acid, include a dimer of acrylic acid (hereinafter known as dimer); acrylic acid trimer (hereinafter called trimer); and the tetramer of acrylic acid (hereinafter called the tetramer). In addition, examples of the Michael adducts obtained upon receipt of the acrylate include: the Michael adducts of acrylic acid with the above-mentioned acrylate, such as Elgiloy ester having from 2 to 8 carbon atoms, or cycloalkenyl ester, such as β-acrilchimproject; Michael adducts of alcohol, such as β-alkoxyphenyl; dimers; trimers; tetramer; esters of trimers; esters tetramers; β-hydroxypropionic acid; and β-hydroxypropionate.

In addition, the polymerization inhibitor is used to inhibit the formation of the product of polymerization during production when getting easily polymerized compounds, such as acrylic acid or acrylate, to the described above.

Specific examples of the polymerization inhibitor used in the present invention include acrylate copper, dithiocarbamate copper compound phenol and connection fenotiazina. Examples of dithiocarbamate copper include: dialkyldithiocarbamate copper, such as copper dimethyldithiocarbamate, copper diethyldithiocarbamate, dipropylthiocarbamate copper and dibutyldithiocarbamate copper; cycloalkylcarbonyl copper, such as atlantajournal copper, tetramethylthiuram copper, pentametilenditiokarbamata copper and hexamethylenediisocyanate copper; and collectiveintelligence copper, such as occipitocervical copper. Examples of phenolic compounds include hydroquinone, mackinon, pyragollole, catechol, resorcinol, phenol and cresol. Examples of compounds fenotiazina include phenothiazines, bis-(α-methylbenzyl)phenothiazines, 3,7-dioctylphthalate and bis-(α-dimethylbenzyl)phenothiazines.

Other substances may be included according to the present invention, depending on the method, but their styles can be chosen arbitrarily without prejudice to the effect of the present invention.

The present invention will be described in more detail. Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1, 3 and 4 each is a view of the vertical section of the lower part of the column to the traditional equipment for easily curable compounds according to variant implementation of the present invention. 5 and 6 are schematic diagrams of distillation apparatus decomposition reaction using column equipment. First will be described the structure of the distillation apparatus decomposition reaction.

The distillation apparatus is a distillation device for acrylic acid. As shown in figure 5, the distillation apparatus includes: a housing 1 of the column as the distillation column; refrigerator 20 for cooling the vapor of acrylic acid, distilled from the case 1 columns; reflux tank 21 for the reception of acrylic acid, condensed in the refrigerator 20; vent gas cooler 25 for additional cooling of the gas component in the reflux tank 21; vacuum equipment 26 to create an atmosphere distillation under reduced pressure; a drain line for draining the column of liquid in the housing 1 of the column; a circulation passage for the return part of the column bottom liquid is withdrawn through outlet in the housing 1 of the column; and a reboiler 5 for heating the column bottom liquid in the circulation passage.

The pump 22 is connected with a reflux tank 21, and the pipe 23 connected to the upper division of the housing 1 of the column is connected to the pump 22. The pipeline 24 branches off from the pipe 23.

The drain line includes: pipe outlet 2 connected to the lower h is STU housing 1 columns; the pipe 11 connected to the pipe outlet 2, the pump 12 connected to the pipe 11; and a pipe 13 connected to the pump 12.

The circulation passage contains: tube input 3 connected to the exhaust pipe 2, through which is injected at least part of the column bottom liquid of the column, taken on the pipe outlet 2; line 4 is connected to the pipe input 3; reboiler 5, connected with the pipe 4 and the pipe 6 connected to a reboiler; and a branch pipe 7 connecting pipe 6 and the open part that is opened in the side wall of the housing 1 columns, for supplying a column bottom liquid from the pipe 6 into the housing 1 of the column.

In the distillation apparatus shown in figure 5, the crude acrylic acid is introduced into the housing 1 columns for distillation, and part of the column bottom liquid is circulated through the exhaust pipe 2, the pipe entry 3, line 4, the reboiler 5, pipe 6 and the pipe 7. The column bottom liquid is also displayed as the rest through the pipe outlet 2, line 11, pump 12 and line 13.

Fraction from the upper part of the column is introduced into the reflux tank 21 through the pipe 19 and the refrigerator 20 to condensation. Part of the acrylic acid in the reflux tank is returned to the upper part through the columns of the pump 22 and line 23. The remaining acrylic acid is derived as purified AK the sludge acid through line 24, which branches off from the pipe 23. Gas in the reflux tank 21 is cooled again in the vent gas refrigerator 25, and condensed acrylic acid is returned to the reflux tank 21. The gas component is removed as a vent gas after passing through the vacuum equipment 26.

In distillation apparatus for acrylic acid, shown in figure 5, the temperature of the lower part of the column is preferably from 60 to 120°C., most preferably from 70 to 100°C. the Pressure is preferably from 1 to 50 kPa, most preferably from 2 to 20 kPa.

In addition, the apparatus for the decomposition reaction is an apparatus for the decomposition reaction of the high-boiling substances formed in the production method of acrylic acid or acrylate. As shown in Fig.6, the apparatus for the decomposition reaction is supplied with: case 1 columns as the columns of the decomposition reaction of the high-boiling substances; heat exchanger cooling gas 30 in the upper part of the column for cooling the vapor of acrylic acid or acrylate, distilled from the housing 1 of the column, a reservoir for liquid 31 for the reception of acrylic acid or acrylate, condensed in heat exchanger cooling gas 30 in the upper part of the column; a ventilation heat exchanger for cooling the gas 35 for additional cooling gas is omponent reservoir fluid 31; a drain line for draining the column bottom liquid of the housing 1 of the column; a circulation passage for return to the body 1 of the column part of the column bottom liquid is allocated through the drain line; a reboiler 5 for heating the column bottom liquid in the circulation passage.

The pump 32 is connected to the reservoir for the liquid 31, and the pipe 33 is connected to the pump 32. The pipe 34 is connected with the heat exchanger for cooling the gas 30 in the upper part of the column, branches off from pipe 33.

The drain line includes: pipe outlet 2 connected to the lower part of the housing 1 of the column; a pipe 11 connected to the pipe outlet 2, the pump 12 connected to the pipe 11; and a pipe 13 connected to the pump 12.

The circulation passage contains: tube input 3 connected to the exhaust pipe 2, through which is inserted at least part of the column bottom liquid, exhaust pipe exhaust 2; line 4 is connected to the pipe input 3; pump 40 connected to the pipe 4, the pipe 41 connected to the pump 40; the reboiler 5, connected to a pipe 41; and a pipe 6 connected to a reboiler 5; and a branch pipe 7 connecting pipe 6 and the open part that is opened in the side wall of the housing 1 columns, for supplying a column bottom liquid of the pipe 6 to the body 1 of the column.

The high-boiling part of the substance is found in enclosure 1 of the column and subjected to decomposition reaction. Part of the column of liquid is returned into the housing 1 of the column through the pipe outlet 2, the pipe entry 3, line 4, pump 40, the reboiler 5, pipe 6 and the pipe 7. The column bottom liquid is also diverted through the pipe outlet 2, line 11, pump 12 and line 13.

Gaseous decomposition products are introduced into the reservoir for the liquid 31 from the upper part of the column through line 29 and the heat exchanger for cooling the gas 30 in the upper part of the column. The liquid inside the reservoir for the liquid 31 is given as the recovered liquid through pump 32 and pipe 33. Part of the liquid received in the reservoir for the liquid 31 is returned to the heat exchanger for cooling the gas 30 in the upper part of the column through line 34, branches off from the pipe 33. The gas inside the reservoir for the liquid 31 is cooled in the ventilation heat exchanger for cooling the gas 35. The condensate is returned to the reservoir for the liquid 31, and neskondensirovannyh gas is discharged through the pipe 36.

Apparatus for the decomposition reaction of acrylic acid and acrylate shown in Fig.6, the temperature of the decomposition reaction is preferably from 110 to 250°C., most preferably from 120 to 230°C. the Time of the decomposition reaction is preferably from 0.5 to 50 hours (from 10 to 50 hours at a low temperature of decomposition and from 0.5 to 10 hours at high the th decomposition temperature). Pressure may be a reduced pressure or normal pressure.

As shown in figure 5 and 6, the pump may be located upstream of reboiler 5 in the circulation passage. Vacuum equipment is usually not provided in the apparatus of the decomposition reaction, but can be placed downstream of the ventilation heat exchanger for cooling the gas 35 depending on conditions such as the type or composition of the high-boiling substances, similar to the distillation apparatus.

The pipes 2 and 11, the components of the line-of-way at 5 and 6, are connected to the connecting flanges 2A and 11a, as shown in figure 1. The pipes 3, 4 and 6 and the pipe 7 constituting the circulation passage figure 5 and 6, are connected to the connecting flanges 3A and 4A and the connecting flanges 6A and 7a, as shown in figure 1.

As shown in figure 1, the housing 1 of the column is provided with: a side wall feed opening 1A, open in the side wall for the filing of a column bottom liquid in the housing 1 of the column out of the socket 7, the upper plate 12A, which is located so that it extends from the side wall above the feed opening 1A, to prevent upward dispersion of the column bottom liquid of the feed holes 1A; and bump 12b, which is located away from the feed holes 12A, to prevent dissipation of the column bottom liquid of the hole is to supply 1A in the feed direction (the direction from the side wall to the center of the housing 1 columns).

The top plate 12A is made of element plates having the same thickness. As shown in figure 1, the top plate 12A is inclined downward from the base end to the tip so that the angle (tilt) between the direction of the length of the top plate 12A and the side wall is 91° or more. The inclination preferably is in the range from 91 to 135°, more preferably from 95°to 135°. The top plate 12A is an element plates having the same thickness, and thus, the angle between the upper surface of the upper plate 12A and the side wall is equal to the angle of inclination. The top plate 12A to accelerate the fall of the liquid collected on the upper surface of the top plate 12A, may be there is a hole. However, the hole is not necessary.

The bump 12b are also made of element plates having the same thickness. As shown in figure 1, the bump is located vertically to the top plate 12A downward from the trailing edge of the top plate 12A. Length length down the bump 12b are practically unlimited. However, the bump 12b, preferably, passes down to the lower end edge of the feed holes 1A or later, and the length of the bumper, more preferably equal to or more than the diameter of the feed holes 1A. The bump 12b may be located parallel to the side wall or the location is at right angles to the side wall so that the distance between the side wall and a baffle 12b gradually increases from top to bottom, for example.

As shown in figure 2, the width And the upper plate 12A or bump 12b, preferably equal to or more than the diameter of the feed holes 1A. The length of the top plate 12A is practically not limited, but, preferably, is set according to the open area of the baffle 12b equaled or was greater than the cross-sectional area of the feed holes 1A.

Open space used here is determined by multiplying the width (a in figure 2) bump stop 12b and the distance between the side wall and a baffle 12b. When the thickness of the bump 12b essentially small compared to the open area, the open area can be determined by multiplication of a and b in figure 2.

The column bottom liquid is heated in the reboiler 5, is fed into the housing 1 columns of the pipe 7 through the inlet 1A. The upward flow or dispersion of a column bottom liquid is fed from the feed holes 1A, is limited to the top plate 12A, and the flow or dispersion in the Central direction of the housing 1 column a column bottom liquid is limited by the bump 12b. The column bottom liquid is fed from the feed holes 1A, passes through the downward direction regardless of the flow rate. So Russ is ivanie column bottom liquid to a side of the housing 1 of the column or inside columns 1, contains plates, nozzle and similar delivered on demand, can be prevented.

The top plate 12A is inclined in a downward direction from the base end to the tip top plate 12A, and thus, the column bottom liquid or condensate is easily polymerized compounds, such as acrylic acid, acrylate, raw material of acrylic acid and acrylate, and by-products in the body 1 of the column pass down from the top plate 12A, even if stuck to the upper surface of the top plate 12A. Thus, the accumulation of condensate on the upper surface of the upper plate 12A is prevented, thereby can be prevented the formation of polymeric products from the condensate.

Case 1 columns may include: a vertical plate, which is installed vertically and downward from each side of the top plate 12A from the side end edge of the top plate 12A, to prevent dissipation of the column bottom liquid in the horizontal direction of feed holes 1A; and a bottom plate below the feed holes 1A, for example, as a complement to bump 12b, when you need it. The bottom plate can be positioned with a slope or with holes in the top plate 12A. When a large volume of the column bottom liquid circulates from reboiler, the volume of the hearth and the column bottom liquid is large, and the accumulation of a column bottom liquid does not occur on the upper surface of the bottom plate. In this case, the bottom plate may be horizontal, and does not require the supply holes. The top plate 12A may be located along the side wall of the housing 1 of the column, and the length of the top plate 12A is practically unlimited.

Figure 5 and 6 shows the housing 1 of the column, line removal and coolant circulation passage, depicted in figure 1, but may also refer to the housing 1 column, line removal and coolant circulation passage, shown in each of Fig 3 and 4.

The hull structure 1 columns and peripheral parts of figure 3 is the same as the structure of the housing 1 columns and peripheral parts in figure 1, except that the connection of the input 3 is connected closely with the lower part of the housing 1 of the column to directly enter the column bottom liquid to circulate from the housing 1 of the column; and a pipe for draining 2 no branches off and is connected directly with the pipe 11.

The hull structure 1 columns and peripheral parts in figure 4 is the same as the structure of the housing 1 columns and peripheral parts in figure 1, except that the volume fraction of 10, increasing from top to bottom, located in the lower part of the housing 1 of the column; a pipe for input 3 is connected to the volumetric part 10 on the side of the thick part 10; the column bottom of the liquids is ü introduced for circulation of the thick part 10; and pipe to drain 2 connected to the lower part of the thick part 10, not branches off and is connected with the pipe 11.

In the structures shown in figure 3 and 4, the dispersion of the column bottom liquid into the housing 1 of the column and the formation of polymer product on the upper surface of the upper plate 12A is also prevented, as in the structure shown in figure 1.

Examples

Further, the present invention will be described in detail based on examples and comparative examples, but the present invention is not limited to them.

<Example 1>

The reaction of the decomposition of the high-boiling liquid was performed using the apparatus for the decomposition reaction shown in Fig.6. Corner installation θ (tilt) of the upper plate 12A was 95°. Case 1 column, which represents the decomposition reactor has a diameter of 1000 mm and a length of 2800 mm, was made of Hastelloy C. the high-boiling liquid has a composition consisting of: 21,0 wt.% of butyl acrylate; 65,0 wt.% β-butylperoxybenzoate, 4.0 wt.% butylenediamine, 2.0 wt.% β-butylhydroxytoluene, 3.0 wt.% hydroquinone, 2.0 wt.% methoxyimino and 3.0 wt.% the other components. High-boiling liquid was applied to the housing 1 of the column with a speed of 580 kg/h

10 wt.% 1 wt.% an aqueous solution of sulfuric acid of relatively high-boiling liquid was applied to the housing 1 of the column as the catalysis of the torus decomposition reaction. The decomposition reaction was carried out at a pressure of 100 kPa, the decomposition temperature of 197°C and a contact time of 50 minutes In the reaction residue was obtained when 200,1 kg/h and was taken from the bottom of the column. The reaction residue had a composition consisting of about 8.7 wt.% of butyl acrylate; 62.5 wt.% β-butylperoxybenzoate, 2.0 wt.% butylenediamine, 0.3 wt.% butyl-β-butylhydroxytoluene, to 8.7 wt.% hydroquinone, 5.8 wt.% methoxyimino, 0.8 wt.% butanol, 2.9 wt.% sulfuric acid and 8.3 wt.% the other components.

The reboiler 5 is a vertically fixed tube plate type heat exchanger. Supply column bottom liquid in the reboiler 5 was measured by using a flow meter located at the outlet of the pump 40, and the initial flow rate was 32000 kg/h of the Column bottom liquid is passed through pipe reboiler 5.

After continuous operation for 3 months, work was stopped and the reboiler 5, the inner part of the housing 1 of the column, the top plate 12A and the bump 12b were subjected to control. Testing results confirmed the absence of accumulation of substances, stable flow of the liquid in the reboiler 5 during operation, no clogging during operation.

<Example 2>

The same operation was repeated as in example 1 except that the angle of installation 9 (slope) of the top plate 12A changed to 100°. After the reading operation for 3 months, work was stopped and the reboiler 5 and all other equipment subjected to control. Testing results confirmed the absence of accumulation of substances, the absence of clogging during operation.

<Comparative example 1>

The same operation was repeated as in example 2, except that the angle of installation 9 (slope) of the top plate 12A changed to 90°. After continuous operation for 3 months, the reaction temperature could not be maintained. The apparatus of the decomposition reaction was stopped and the interior of the apparatus was subjected to control. Testing results confirmed that the viscous polymer product on the upper surface of the top plate 12A, the polymer product within the pipe reboiler 5.

<Example 3>

The reaction of the decomposition of the high-boiling liquid was performed using the same apparatus as in example 1. The composition of the high-boiling liquid consisted of 45.3 wt.% of acrylic acid, 10 wt.% maleic acid, 42,4% of the dimer of acrylic acid (aryloxyphenoxy acid), 1.3 wt.% hydrochinone and 1.0 wt.% fenotiazina. High-boiling liquid was applied to the housing 1 of the column at 580 kg/h

The decomposition reaction was carried out at a pressure of 72 kPa, the decomposition temperature of 188°C and a contact time of 70 minutes. The result has been the reaction residue when 130,5 kg/h from the bottom of the column. The reaction residue had a composition consisting of: 8.0 wt.% acrylic acid, of 14.0 wt.% maleic acid, and 67.2 wt.% is the iMER acrylic acid (aryloxyphenoxy acid), 5.8 wt.% hydroquinone, 4,4 wt.% fenotiazina and 0.6 wt.% the oligomer and polymer.

After continuous operation for 3 months, work was stopped and the reboiler 5 and all other equipment subjected to control. Testing results confirmed the absence of accumulation of substances, stable supply column bottom liquid in the reboiler 5 during operation and the absence of clogging during operation.

<Comparative example 2>

The same operation was repeated as in example 2, except that the angle of installation 9 (slope) of the top plate 12A changed to 90°. After continuous operation for 1 month the temperature of the column bottom liquid was impossible to maintain. The apparatus of the decomposition reaction was immediately stopped and the inside of the apparatus was subjected to control. Testing results confirmed that the popcorn-like polymerization product of the upper surface of the upper plate 12A, partial clogging of pipes reboiler 5.

<4>

Distillation of the crude acrylic acid was performed using the apparatus for distillation, shown in figure 5, using a distillation column made of stainless steel SUS 316 having an inner diameter of 1100 mm and length 20000 mm, and 21 of the perforated plate (dual streaming plates)installed within the housing 1 of the column.

Corner installation 9 (slope) of the top plate 12A is left 100°. The pump was located in the middle of the pipeline 4. Pipeline 4 have the same diameter as the pipe to enter 3. Crude acrylic monomer represented a mixture of 99.2 wt.% of acrylic acid, 0.3 wt.% dimer of acrylic acid, 0.1 wt.% hydroquinone and 0.1 wt.% fenotiazina, and the mixture was applied to the housing 1 of the column at 90°C and 1300 kg/h

The liquid obtained by dissolving 8 wt.% methanone in acrylic acid, was filed in the reflux tank 21 when 6,2 kg/h from a not shown tank for the liquid containing the polymerization inhibitor. The liquid obtained by dissolving 1 wt.% fenotiazina in acrylic acid was given in case 1 column at 31 kg/H. the Operation was conducted at a pressure in the upper part of the column, equal to 2.8 kPa, and the pressure in the lower part of the column, equal to 7.9 kPa, the temperature of the upper part of the column, equal to 53°C, and the temperature of the lower part of the column, equal to 75°C., thus obtaining from the upper part of the column of high-purity acrylic acid having a purity 99.8 wt.% or higher.

The reboiler 5 represented vertically fixed tube plate type heat exchanger. Supply column bottom liquid in the reboiler 5 was measured by a flow meter installed at the outlet of the pipe 4, and the initial flow rate was 68000 kg/h of the Column bottom liquid is passed through pipe reboiler 5.

After epreryvno work within 6 months, the work was stopped, and the reboiler 5 were subjected to control. Testing results confirmed the absence of accumulation of substances, stable supply column bottom liquid in the reboiler 5 during operation, and the absence of clogging during operation.

<Comparative example 3>

The same operation was repeated as in example 4, except that the angle of installation 9 (slope) of the top plate 12A changed to 90°. After continuous operation for 4 months the temperature of the column bottom liquid was impossible to maintain, and the flow could not be submitted to the reboiler 5. The apparatus of the decomposition reaction was stopped, and the apparatus inside was subjected to control. Testing results confirmed that the popcorn-like polymerization product of the upper surface of the upper plate 12A, partial clogging of pipes reboiler 5.

Industrial applicability

According to the present invention is a simple structure that includes a top plate with inclination of the upper surface, inhibits the formation of polymer product on the upper surface of the upper plate, mainly due to the contained liquid is easily curable compound. Thus, such a problem as clogging the product of polymerization is removed, and the present invention can provide the capacity for easily curable compounds, capable of sustainable continuous operation for a long time what about the period of time when processing is easily curable compound, such as the production and purification of easily curable compounds.

When the present invention is applied to column equipment, including heating of the column bottom liquid, which is a liquid containing an easily curable compound in the reboiler, and the circulation of the column bottom liquid, such as in a distillation column, evaporator column or in the column for the decomposition reaction, the clogging of reboiler products of polymerization is prevented. Thus, column equipment can stably and continuously work for a long period of time.

In particular, the present invention is more effective when used in the manufacture or purification of (meth)acrylic acid (acrylic acid or methacrylic acid and their esters.

1. The capacity to easily polymerized compounds, receiving the liquid containing an easily curable compound containing:
the receiving part, which has a side wall and a hole for the fluid in the side wall,
top plate, which is arranged so that it extends from the side wall above the openings to prevent dissipation up fluid from the hole, and
the bumper, which is removed from the hole, to prevent the dispersion liquid from the hole in the feed direction, while
the top surface of the top plate is inclined downward from its base end to the tip, with the end of the side wall of the upper plate is formed as a base end, and the protruding end of the upper plate is formed as a tip.

2. The capacity to easily curable compound according to claim 1, which further comprises a passage for fluid circulation, drainage, received in the receiving part, and to return the fluid to the receiving portion through the opening, and a reboiler for heating the liquid in the passage for fluid circulation.

3. The capacity to easily curable compound according to claim 1 or 2, in which the receiving part is one selected from the group consisting of a distillation column, evaporator columns and columns for the reaction of decomposition of high-boiling substances.

4. The capacity to easily curable compound according to claim 1, in which the angle between the upper surface of the upper plate and the side wall is in the range from 91 to 135°.

5. The capacity to easily curable compound according to claim 1, in which easily curable compound is at least one selected from the group consisting of (meth)acrylic acid and (meth)acrylate.



 

Same patents:

FIELD: technological processes.

SUBSTANCE: invention is related to method for production of polyester with application of tubular reactor of etherification, both in new and existing (renovated) plants. Method is described for production of polyester with application of tubular reactor. Method includes etherification of liquid reagent in tubular reactor with production and further initiation of liquid reaction mixture and side gaseous product via part of tubular reactor with addition of oligomer.

EFFECT: production of polyester with conversion from 51,9% to 94,2%.

19 cl, 27 dwg, 9 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention concerns method of dosing at least one solid catalyst out of particles and/or auxiliary substance of process in reactor (5) including pseudoliquefied layer (11) of particles in at least partially gaseous medium where process catalyst and/or auxiliary substance quantity is dosed at given time intervals in pseudoliquefied layer (11) at at least one dosing point (10) where in each case liquid medium flow is put in reactor (5) so as to form an area with decreased particle density in pseudoliquefied layer (11) around dosing point(s) (10). Then catalyst(s) and/or auxiliary substance(s) quantity is dosed in that area, with liquid medium flow put in periodically at interval of 0.5 to 60 seconds, and catalyst quantity is measured over 0.5 to 3 second delay after the start of liquid medium flow input. Also invention claims method of continuous polymerisation for obtaining ethylene and propylene homopolymers and copolymers, and device for method implementation.

EFFECT: possible penetration of catalyst from one dosing point deeper into pseudoliquefied layer due to decreased particle density, thus allowing prevention of high local catalyst concentration.

15 cl, 8 dwg, 4 ex

FIELD: technological processes; heating.

SUBSTANCE: used cloth nozzle (1) comprises vertical layers (11', 12') formed by wire cloth materials (11, 12) that make together wavy or corrugated flow channels (13). Flow of gas or steam flows along flow channels, and liquid flow flows on wire cloth. Flow channels of neighboring layers openly intersect. Angle between intersecting channels is approximately below 100°. At that cloth nozzle experiences relatively low liquid load. Wire cloth forms carrier for flow of liquid, which is mostly free from holes or other ruptures. Values for liquid load are accepted according to the following ratio: L/a < 10 l/m·hour. At that L is specific load per liquid volume unit per unit of nozzle cross section surface, and a is specific surface of wire cloth tension. Cross-channel nozzle (1) comprises at least one nozzle element (10, 10', 10"), and every nozzle element has distinguished lower edge zone (102), middle zone (100) and upper edge zone (101).

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8 cl, 4 dwg

FIELD: engines and pumps; chemistry.

SUBSTANCE: reactor system comprises reactor tube, which contains compressed layer of molded carrier material, which may include catalytic component. Molded carrier material, for instance, aluminium oxide, has geometric configuration of hollow cylinder. Catalyst contains silver. Hollow cylinder has ratio of rated length to rated external diameter from 0.5 to 2, and ratio of rated external diameter to rated internal diameter, which exceeds 2.7. Reactor system also has such combinations of reactor tube diameter and geometric parameters of molded catalyst carrier, which make it possible to produce compressed layer of catalyst in reaction system with high density of package with minimum pressure drop via compressed layer of catalyst.

EFFECT: higher efficiency.

21 cl, 7 dwg, 3 tbl, 7 ex

FIELD: engines and pumps.

SUBSTANCE: high temperature reactor has jacket 1, which contains layer of external heat insulation 2 and layer of internal heat insulation 3, which is formed by high temperature heat insulating material arranged by freely laid layers. Internal heat insulation 3 is designed for heat conductivity from 0.14 to 0.5 W/mC at temperatures up to 1,600°C. In order to compensate thermal expansion, gap 5 is provided upwards, and gap 7 is arranged between internal and external layers of heat insulation.

EFFECT: high efficiency and lower power consumption.

17 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: present invention pertains to polymerisation methods for obtaining polymers using bayonet cooled reactor systems and solvents, containing hydroflurocarbons. The method relates to obtaining (co)polymers, involving bringing isoolefine into contact with multiolefine or isoolefine with alkylstyrol using a catalyst system, containing one or more Lewis acids or one or more initiators, and a solvent, containing one or more hydroflurocarbons in a reactor, comprising a pipe or several pipes used for coolant circulation. The reactor also has connection pipes for transferring the catalyst system to the bottom part, and connection pipes for removing the polymer from the upper part, as well as a mixer axle with mixing blades, located high up the mixer axle. The given method of polymerisation allows for reducing agglomeration of particles and clogging up of the reactor, without deterioration of the parameters of the process, conditions or components, and/or without reducing output/capacity and/or capacity to produce polymers with high molecular weight.

EFFECT: reduced agglomeration of particles and clogging up of the reactor, without deterioration of the parameters of the process, conditions or components, and/or without reducing output/capacity and/or capacity to produce polymers with high molecular weight.

34 cl, 25 tbl, 148 ex, 8 dwg

FIELD: technological processes; physics.

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EFFECT: higher resistance and efficiency of reactor.

3 cl, 4 dwg

FIELD: engines and pumps.

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3 cl, 5 dwg

FIELD: technological processes.

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3 cl, 2 dwg

FIELD: motors and pumps.

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EFFECT: improved effectiveness of mass-exchange and reaction processes and plant operation effectiveness and reliability.

19 cl, 8 dwg

FIELD: mechanics.

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12 cl, 2 dwg, 1 tbl

FIELD: oil producing industry Gas distributor.

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EFFECT: improvement of fine dispersed streams separation, reducing dimensions of the device, simplifying installation of the structure in column apparatus.

6 dwg

FIELD: engines and pumps.

SUBSTANCE: vapour guiding device (30) used in elongated, mainly, vertical mass transfer and/or heat exchange columns (10) with an inner space (16) containing an elongated, normally arc-like wall (32) arranged so that it stays inside the inner space (16) and runs along the column lengthwise axis. The arc-like wall (32) incorporates an inlet zone arranged to contact with a vapour flow or a mixed phase flow entering the column (10) and to force the flow to follow along the outer surface (132) of the arc-like wall (32), primarily around the axis. The device incorporates also the main elongated blade (36a) extending outward from the outer surface (132) of the arc-like wall (32). The main blade (36a) has an inner edge (136a), arranged nearby the outer surface (132) of the inner wall (32) and an outer edge (236a) arranged at a distance from the outer surface (132) of wall (32). Blade (36a) is arranged tangentially to the flow direction so that the inner edge (136a) of blade (36a) runs more downstream relative to the blade outer edge (236a), which allows whatever part of the flow being incident on the main blade (36a) to be redirected to the outer surface (132) of arc-like wall (32). The device (30) incorporates, preferably, one or more blades (36b) extending radially outward from the outer wall (132).

EFFECT: improved vapour distribution across the column.

12 cl, 4 dwg

FIELD: mechanical engineering; cleaning facilities.

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EFFECT: improved cleaning of fluid medium.

17 cl, 1 dwg

FIELD: heat and mass exchange processes.

SUBSTANCE: mass-exchanging tower comprises housing with plates and members connected with the power source. The members are interposed between the plates, are connected with the negative pole of the power source, and are mounted on the supports made of a dielectric material. Each member is made of a metallic grid connected with the positive pole of the power source and is secured to the frame with positive buoyancy and made of dielectric material and can move vertically for permitting the space between the wall and liquid level to be constant.

EFFECT: enhanced efficiency.

1 dwg

FIELD: mechanical engineering; oil-processing industry; gas-processing industry; devices for separation of the gases into fractions.

SUBSTANCE: the invention is pertaining to the field of mechanical engineering, in particular, to the process engineering of separation of the natural gas into fractions, for example, at reprocessing of the oil gases by the low-temperature condensation and may be used in the oil-processing industry and the natural gas-processing industry. The most preferable is usage of the presented device in the capacity of the deethanizer or the demethanizer. The device for separation of the gas into the fractions is made in the form of the distillation column consisting of two communicating to each other sections - the upper section and the lower section. The column has two inlets, one of which is arranged in the lower section, and another - in the upper section, and two outlets. The device contains the drips-deflector and the cooler arranged in the upper part of the upper section, the tubular components made in the form of the spiral used for the sections communication to each other and arranged in the lower part of the upper section. The sections are divided by the partition with the holes used for arrangement of the ends of the tubular components and outlets are arranged in the upper and the lower parts of the upper section accordingly. The cooler is made in the form of the hollow cylinder from the external side of which there is the tubular coil used for the coolant. The drips-deflector consists of the lower and upper cylinders, at that the upper cylinder has the smaller diameter and is arranged in the lower cylinder with the clearance concerning the bottom of the lower cylinder forming the labyrinth for passage of the fraction of the gas, and the lower cylinder has the hole for the gas withdrawing pipeline. The device is supplied with the components for condensation of the liquid and is made in the form of the feed screws arranged inside the spiral of the tubular components. The invention ensures simplification of the design of the device at improvement of the quality of separation of the hydrocarbon-containing raw.

EFFECT: the invention ensures simplification of the design of the device at improvement of the quality of separation of the hydrocarbon-containing raw.

4 cl, 2 dwg

FIELD: chemical industry; gas and oil industries; other industries; production of the heat-mass-exchange devices.

SUBSTANCE: the invention is pertaining to the apparatuses used for heat-mass-exchange processes in the systems of gas or vapor-liquid, in particular, to the rectifying, absorption columns, the heterophase reactors of the column type and may be used in various industries. The heat-mass-exchange apparatus contains the body with the connecting pipes of inlet and outlet phases and the disposed in altitude contact plates, each of which is made in the form of the base with the holes, the overflow connecting pipes and the valves, and the collector with the connecting pipes for feeding and withdrawal of the heat transfer medium. The overflow connecting pipe is arranged at the wall of the body and consists of two parts, in the upper part of which on the grating there is the nozzle, and in the lower part there is the heat exchanger made in the form of the jacket with the connecting pipes connected to the connecting pipes of the collector. Above the overflow connecting pipe there is the non-centrally mounted valve with the positive floatability. The technical result of the invention is the increased stability of the heat-mass exchange process in the gas-(vapor)-liquid streams in the broad range of variations of the consumption of the gas (vapor) and the liquid on each plate that improves the quality separations, and simplifies the design.

EFFECT: the invention ensures the increased stability of the heat-mass exchange process in the gas-(vapor)-liquid streams on each plate, improves the quality separations, and simplification the design of the heat-mass-exchange apparatus.

1 dwg

FIELD: liquid distributors for mass-exchange columns.

SUBSTANCE: proposed liquid distributor is used for distribution of liquid in lower mass-exchange layer consisting of several disordered, grid-type or structurized elements of packing. Liquid distributor is provided with many extended chutes separated from one another and laid across the column. Side walls of chutes have many liquid drain holes located in one or several planes at definite distance from chute bottom. Reflecting shields are located on the outside of chute side walls; they receive liquid through upper parts. Lower parts of reflecting shields form narrowed outlet hole located in plane below chute and used for draining liquid from reflecting shields to lower mass-exchange layer. Liquid drain holes in one of side walls of chute are displaced relative to the like holes in other side wall of chute for smooth distribution of liquid in outlet hole. Position of reflecting shields may be regulated vertically; they shall be supported by upper surface of mass-exchange layer so that liquid should be fed directly to mass-exchange layer, thus decreasing probability of entrapping falling liquid by vapor flow ascending through mass-exchange layer. Liquid escaping from outlet hole forms flow in form of curtain excluding penetration of vapor into outlet hole. Vapor admitted to outlet zone may be discharged upward through opening between shields and respective chutes at reduced velocity, thus excluding entrapping of liquid. Said opening is used for entrapping any liquid escaping from chutes by draining it downward over inner surface of reflecting shields.

EFFECT: enhanced efficiency.

33 cl, 7 dwg

FIELD: gas-production industry; oil-producing industry; other industries; methods and devices for separation of a liquid from a gas.

SUBSTANCE: the invention is pertaining to the methods for separation of a liquid from a gas and to the design solution of the devices for distribution of the gaseous and the liquid flows along the cross-section of the apparatus and separation of the liquid from the gas flow, which may be used for the processes of separation, absorption, rectification in the gas-production industry, oil-producing industry and in the apparatuses for realization of the similar production processes. The method of separation of a liquid from a gas includes: the radial feeding of the mixture into the body of the apparatus, its distribution along the cylindrical wall with the subsequent division into the radial flows directed to the axis of the apparatus and passing into the axial flows. The radial flows are divided into jets, separate them from the liquid on the surfaces located along the wall, then additionally distribute in the cross section of the apparatus. Separation of the radial flows from the liquid conduct on the vertical porous components, using which the liquid is diverted into the still bottom unit of the apparatus below the mixture feeding. The device for realization of the method of separation of the liquid from the gas includes the perforated shell established inside the body of the apparatus opposite to the gas inlet fitting pipes with a clearance to the body overlapped by partition in its upper part. On the shell opposite to the perforation there are the vertically orientated rows of the porous volumetric components overlapping the channels of the perforation. The clearance between the shell and the body and the top of the shell are overlapped by the semi-dead plate with the gas passage fitting pipes connected with the internal cavity of the shell. The shell in its lower part has the water lock or is partially overlapped. It is made out of out the plane components closed by the body of the apparatus. The invention allows to increase efficiency of the separation and to reduce ablation of the liquid.

EFFECT: the invention ensures the increased efficiency of the separation and reduction of the liquid ablation.

5 cl, 2 dwg

FIELD: cryogenic engineering, in particular, devices for separation of crypton-xenon concentrate obtained at air-separating installations.

SUBSTANCE: the mass-transfer apparatus has a contact device including the concentration and exhausting sections filled with packings, inlet chamber, condenser-evaporator, still with an electric heater and evaporator, still with an electric heater and evaporator. In addition, the inlet chamber of the feed flow of the mass-transfer apparatus (rectifying column) has a packing section with a specific surface less than the specific surface of the packing of the concentration section, is provided with a heater and a thermal converter, and the feed flow branch pipe- with a thermal bridge. The concentration and exhausting sections have different dimensions of the free cross-sectional areas, have reflux distributors and redistributors spaced in height at distance L=(150 to 300)d equiv; where d equiv. - the equivalent diameter of the packing, perforated tubular vertical inserts are additionally installed in the drain holes of the bottoms of the reflux distributors and redistributors. The straight-tubular tube still of the condenser of the intermediate heat-transfer agent has at least one duct, whose cross-sectional area is commensurable with the total area of the flow areas of the heat-transfer tubes, and the still electric heater - the heat-transfer base with an electric heating element packed and covered with heat-transfer powder and pressed to the still bottom by pull rods provided with springs.

EFFECT: enhanced reliability of the mass-transfer apparatus and reduced specific amount of metal per structure.

6 dwg

FIELD: cryogenic engineering, in particular, devices for separation of crypton-xenon concentrate obtained at air-separating installations.

SUBSTANCE: the mass-transfer apparatus has a contact device including the concentration and exhausting sections filled with packings, inlet chamber, condenser-evaporator, still with an electric heater and evaporator, still with an electric heater and evaporator. In addition, the inlet chamber of the feed flow of the mass-transfer apparatus (rectifying column) has a packing section with a specific surface less than the specific surface of the packing of the concentration section, is provided with a heater and a thermal converter, and the feed flow branch pipe- with a thermal bridge. The concentration and exhausting sections have different dimensions of the free cross-sectional areas, have reflux distributors and redistributors spaced in height at distance L=(150 to 300)d equiv; where d equiv. - the equivalent diameter of the packing, perforated tubular vertical inserts are additionally installed in the drain holes of the bottoms of the reflux distributors and redistributors. The straight-tubular tube still of the condenser of the intermediate heat-transfer agent has at least one duct, whose cross-sectional area is commensurable with the total area of the flow areas of the heat-transfer tubes, and the still electric heater - the heat-transfer base with an electric heating element packed and covered with heat-transfer powder and pressed to the still bottom by pull rods provided with springs.

EFFECT: enhanced reliability of the mass-transfer apparatus and reduced specific amount of metal per structure.

6 dwg

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